KR20040048879A - Pneumatic tire and method of producing the same - Google Patents

Pneumatic tire and method of producing the same Download PDF

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Publication number
KR20040048879A
KR20040048879A KR10-2003-7016887A KR20037016887A KR20040048879A KR 20040048879 A KR20040048879 A KR 20040048879A KR 20037016887 A KR20037016887 A KR 20037016887A KR 20040048879 A KR20040048879 A KR 20040048879A
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KR
South Korea
Prior art keywords
rubber
weight
sealant layer
parts
pneumatic tire
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KR10-2003-7016887A
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Korean (ko)
Inventor
후쿠토미타카시
아이베사다후미
Original Assignee
요코하마 고무 가부시키가이샤
혼다 기켄 고교 가부시키가이샤
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Publication of KR20040048879A publication Critical patent/KR20040048879A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/12—Puncture preventing arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16—Auto-repairing or self-sealing arrangements or agents
    • B29C73/163—Sealing compositions or agents, e.g. combined with propellant agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/16—Auto-repairing or self-sealing arrangements or agents
    • B29C73/22—Auto-repairing or self-sealing arrangements or agents the article containing elements including a sealing composition, e.g. powder being liberated when the article is damaged
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C1/0008—Compositions of the inner liner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B60C5/12—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim
    • B60C5/14—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre
    • B60C5/142—Inflatable pneumatic tyres or inner tubes without separate inflatable inserts, e.g. tubeless tyres with transverse section open to the rim with impervious liner or coating on the inner wall of the tyre provided partially, i.e. not covering the whole inner wall
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C08K5/098—Metal salts of carboxylic acids
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
    • C08K5/3432—Six-membered rings
    • C08K5/3437—Six-membered rings condensed with carbocyclic rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
    • B29D2030/0695—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being in the form of one wide strip, e.g. a patch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2030/00—Pneumatic or solid tyres or parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10495—Pneumatic tire or inner tube
    • Y10T152/10666—Automatic sealing of punctures [e.g., self-healing, etc.]
    • Y10T152/10675—Using flowable coating or composition
    • Y10T152/10684—On inner surface of tubeless tire

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Tires In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

본 발명은 분해가스의 발생을 억제하고 점도가 높은 펑크 방지용 실란트층을 포함하는 공기 타이어 및 이의 제조방법에 관한 것이다. 이러한 공기 타이어는, 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 배합한 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 것이다.The present invention relates to a pneumatic tire and a method for manufacturing the same, comprising a puncture-proof sealant layer which suppresses generation of cracked gas and has a high viscosity. Such a pneumatic tire has a sealant layer formed of a rubber composition comprising 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component with respect to 100 parts by weight of a rubber containing 80 parts by weight or more of natural rubber or isoprene rubber. will be.

Description

공기 타이어 및 이의 제조방법 {Pneumatic tire and method of producing the same}Pneumatic tire and method of producing the same

일본 공개특허공보 제(소)53-55802호에는, 펑크 방지 기능을 갖는 공기 타이어로서 폴리이소부틸렌을 퍼옥사이드에 의해 분해하여 실란트형으로 변성시킨 층을 타이어의 내부 표면에 배치한 것이 기재되어 있다. 트레드 부분에 못 등의 이물이 꽂히는 경우, 이와 같은 실란트층을 갖는 공기 타이어에서는 실란트층이 펑크난 구멍을 자동으로 막도록 작용한다.Japanese Laid-Open Patent Publication No. 53-55802 discloses a pneumatic tire having a puncture preventing function, in which a polyisobutylene is decomposed with a peroxide and modified into a sealant-type layer on the inner surface of the tire. have. When foreign matter such as nails is inserted into the tread portion, in the pneumatic tire having such a sealant layer, the sealant layer acts to automatically block a punctured hole.

그러나 퍼옥사이드에 의한 폴리이소부틸렌의 분해를 사용하는 실란트는, 당해 실란트의 분해 반응에서 부탄 가스의 발생이 현저하게 많기 때문에 공업 제품으로서 적합하지 않다. 예를 들면, 타이어 가황시에 부탄가스가 대량으로 발생하면 타이어 내부 표면 형상이 불균일해지며 경우에 따라서는 펑크 방지 기능을 손상시키는 난점이 있다.However, the sealant using decomposition of polyisobutylene by peroxide is not suitable as an industrial product because of the significant generation of butane gas in the decomposition reaction of the sealant. For example, when a large amount of butane gas is generated during tire vulcanization, the tire inner surface shape becomes uneven, and in some cases, there is a difficulty in impairing the puncture prevention function.

본 발명은 펑크가 나지 않는 타이어로 적합한 공기 타이어 및 이의 제조방법, 보다 상세하게는 기존의 펑크가 나지 않는 타이어의 부적합한 부분이 개선되고 우수한 펑크 방지 기능을 갖는 공기 타이어 및 이의 제조방법에 관한 것이다.The present invention relates to a pneumatic tire suitable for a puncture-free tire and a method of manufacturing the same, and more particularly to a pneumatic tire having an excellent puncture preventing function and a method of manufacturing the same, in which an inadequate part of a conventional puncture-free tire is improved.

도 1은 본 발명에 따른 공기 타이어를 도시한 수직 단면도이다.1 is a vertical sectional view showing a pneumatic tire according to the present invention.

발명을 실시하기 위한 최량의 형태Best Mode for Carrying Out the Invention

본 발명의 구성에 대해 첨부한 도면을 참조하여 하기에 상세히 설명한다.The configuration of the present invention will be described in detail below with reference to the accompanying drawings.

도 1은 본 발명에 따른 공기 타이어를 도시한 것으로, 1이 트레드부, 2가 사이드 월부, 3이 비드부이다. 좌우 한쌍의 비드부(3), 3간에는 카커스층(4)이 설치되며, 타이어의 폭 방향 양쪽 말단부가 각각 비드 코어(5)의 주위에서 타이어 내측에서 외측으로 감겨 올려져 있다. 트레드부(1)에 대한 카커스층(4)의 외측에는 다수의 벨트층(6)이 설치되어 있다.1 shows a pneumatic tire according to the present invention, in which 1 is a tread part, a bivalent side wall part, and a 3 bead part. A carcass layer 4 is provided between the right and left bead portions 3 and 3, and both end portions in the width direction of the tire are wound from the inside of the tire to the outside around the bead core 5, respectively. On the outer side of the carcass layer 4 with respect to the tread part 1, many belt layers 6 are provided.

공기 타이어에서 트레드부(1)에 대응하는 타이어 내부 표면의 영역에 걸쳐서 실란트층(7)이 설치되어 있다. 더 구체적으로는, 실란트층(7)이 인너 라이너층(8)의 내측에 적층되며 당해 실란트층(7)의 내측에 커버 시트층(9)이 적층된다. 이들 인너 라이너층(8) 및 커버 시트층(9)은 통상적으로 타이어에 사용되는 고무 조성물로 구성될 수 있다. 실란트층(7)이 트레드부(1)에 대응하는 영역 뿐 아니라 사이드 월부(2) 또는 비드부(3)에 대응하는 영역까지 배치되는 것 또한 가능하다.The sealant layer 7 is provided over the area of the tire inner surface corresponding to the tread portion 1 in the pneumatic tire. More specifically, the sealant layer 7 is laminated inside the inner liner layer 8 and the cover sheet layer 9 is laminated inside the sealant layer 7. These inner liner layers 8 and cover sheet layers 9 may consist of rubber compositions typically used for tires. It is also possible for the sealant layer 7 to be arranged not only in the region corresponding to the tread portion 1 but also in the region corresponding to the side wall portion 2 or the bead portion 3.

실란트층(7)은 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부, 또한 필요한 경우 2,2,4-트리메틸-1,3-디하이드로퀴놀린의 중합체를 1 내지 10중량부 배합한 고무 조성물로 구성된다. 이러한 고무 조성물은 천연 고무 또는 이소프렌 고무의 일부가 분해된 상태로 되어 있으며 높은 점도를 나타낸다.The sealant layer 7 contains 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component with respect to 100 parts by weight of rubber containing 80 parts by weight or more of natural rubber or isoprene rubber, and if necessary, 2,2,4-trimethyl-1,3 It consists of a rubber composition which mix | blended 1-10 weight part of polymers of dihydroquinoline. Such rubber compositions have a portion of the natural rubber or isoprene rubber decomposed and exhibit high viscosity.

공기 타이어에서 못 등의 이물이 트레드부(1)에 꽂혀서 타이어 내부로 침투하는 경우, 실란트층(7)의 고무 조성물이 못 등의 이물에 점착되어 공기의 누설을 방지한다. 한편 못 등의 이물이 빠지는 경우에는 실란트층(7)이 펑크난 구멍을 막아서 공기의 누설을 방지한다. 실란트층(7)을 구성하는 고무 조성물에는 천연 고무 또는 이소프렌 고무 이외에 통상적으로 타이어에 사용되는 고무를 배합할 수 있다. 그러나 고무 100중량부에 천연 고무 또는 이소프렌 고무가 80중량부 미만인 경우 코발트염에 의한 분해반응이 불충분해지며 실란트층(7)의 점도가 부족하게 된다. 또한 필요한 경우 실란트층(7)을 구성하는 고무 조성물에 점성제, 가소제, 촉매 등을 첨가할 수 있고, 고무 분말 또는 단섬유 등이 첨가될 수도 있다.When foreign matter such as nails is inserted into the tread portion 1 in the pneumatic tire and penetrates into the tire, the rubber composition of the sealant layer 7 adheres to foreign matter such as nails to prevent the leakage of air. On the other hand, when foreign substances such as nails are pulled out, the sealant layer 7 blocks the punctured holes to prevent the leakage of air. The rubber composition constituting the sealant layer 7 can be blended with rubber, which is usually used for tires, in addition to natural rubber or isoprene rubber. However, when 100 parts by weight of natural rubber or isoprene rubber is less than 80 parts by weight, the decomposition reaction by cobalt salt is insufficient and the viscosity of the sealant layer 7 is insufficient. If necessary, a viscous agent, a plasticizer, a catalyst, or the like may be added to the rubber composition constituting the sealant layer 7, and rubber powder or short fibers may be added.

코발트염으로는 나프텐산 코발트, 네오데칸산-오르토-붕산 코발트, 아비에트산 코발트 등을 사용할 수 있다. 고무 100중량부에 대한 코발트 성분으로서 코발트염의 배합량이 0.07중량부 미만이면 고무의 분해반응이 불충분해지고 실란트층(7)의 점도가 부족하게 되며, 이와 반대로 0.5중량부를 초과해도 분해효과의 향상을 기대할 수는 없다. 또한 고무 100중량부에 대한 트리메틸 디하이드로퀴놀린 중합체의 배합량이 1중량부 미만이면 분해반응의 촉진효과가 불충분하며, 10중량부를 초과하면 분해반응이 과다하게 진행되어 주행 중 실란트의 유동이나 편재를 유발하게 된다.As the cobalt salt, naphthenic acid cobalt, neodecanoic acid-ortho-boric acid cobalt, cobalt arsenate and the like can be used. If the amount of cobalt salt is less than 0.07 parts by weight of the cobalt component relative to 100 parts by weight of rubber, the decomposition reaction of the rubber becomes insufficient and the viscosity of the sealant layer 7 is insufficient. There is no number. In addition, if the amount of the trimethyl dihydroquinoline polymer blended to 100 parts by weight of rubber is less than 1 part by weight, the effect of promoting the decomposition reaction is insufficient. If the content is more than 10 parts by weight, the decomposition reaction proceeds excessively, causing the flow of sealant or ubiquity. Done.

하기에 공기 타이어의 제조방법에 관해서 설명한다. 본원의 공기 타이어에서는, 상기의 배합한 실란트층의 고무 조성물을 시트 형태로 제조(성형)할 수 있다. 이러한 시트 형태의 고무 조성물로 구성된 실란트층이 타이어의 내부 표면에 걸쳐 인너 라이너층과 커버 시트층 사이에 배치되도록 미가황 타이어를 성형한다. 그 다음 미가황 타이어를 금형 속에 투입하여 통상의 공정과 동일하게 가열한다. 이와 같이 미가황 타이어를 가열하면 실란트층 이외의 부분에서는 가황이 진행되지만 실란트층에서는 고무 조성물이 분해되어 높은 점도를 나타내게 된다. 여기서, 천연 고무 또는 이소프렌 고무의 코발트염에 의한 분해는 기존의 폴리이소부틸렌의 퍼옥사이드에 의한 분해와 상이하기 때문에, 당해 분해반응에서는 가스의 발생이 매우 적다. 따라서 분해가스의 발생을 억제하면서 점도가 높은 펑크 방지용 실란트층을 갖는 공기 타이어를 제조할 수 있다.The manufacturing method of a pneumatic tire is demonstrated below. In the pneumatic tire of the present application, the rubber composition of the blended sealant layer can be produced (molded) in the form of a sheet. The unvulcanized tire is molded so that a sealant layer composed of this sheet-shaped rubber composition is disposed between the inner liner layer and the cover sheet layer over the inner surface of the tire. The unvulcanized tire is then introduced into a mold and heated in the same manner as in the normal process. As such, when the unvulcanized tire is heated, vulcanization proceeds in portions other than the sealant layer, but the rubber composition decomposes in the sealant layer to exhibit high viscosity. Here, since decomposition by the cobalt salt of natural rubber or isoprene rubber differs from the decomposition by the peroxide of the existing polyisobutylene, generation | occurrence | production of gas is very little in the said decomposition reaction. Accordingly, a pneumatic tire having a puncture-resistant sealant layer with high viscosity can be produced while suppressing generation of cracked gas.

상기 제조방법에 따라 펑크 방지용 실란트층을 갖는 공기 타이어를 효율적으로 제조할 수 있지만, 본 발명에서는 다른 제조방법을 사용하는 것 또한 가능하다. 예를 들면, 상기한 실란트층의 고무 조성물을 혼련기, 열 롤, 열 프레스 등의 가열 장치를 사용하여 분해하고 당해 점성 조성물을 타이어의 내부 표면에 부착하거나, 점성 조성물을 시트화하여 타이어의 내부 표면에 설치할 수 있다.According to the manufacturing method described above, the pneumatic tire having the puncture-proof sealant layer can be produced efficiently, but it is also possible to use other manufacturing methods in the present invention. For example, the rubber composition of the sealant layer described above is decomposed using a heating device such as a kneader, a heat roll, or a heat press, and the viscous composition is attached to the inner surface of the tire, or the viscous composition is sheeted to form the interior of the tire. Can be installed on the surface.

본 발명의 목적은 분해가스의 발생을 억제하면서 점도가 높은 펑크 방지용 실란트층을 갖는 공기 타이어 및 이의 제조방법을 제공하는 것이다.An object of the present invention is to provide a pneumatic tire having a puncture-resistant sealant layer with high viscosity while suppressing generation of cracked gas and a method of manufacturing the same.

당해 목적을 달성하기 위한 본 발명의 공기 타이어는 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 배합한 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 것을 특징으로 한다.The pneumatic tire of the present invention for achieving the above object comprises a sealant layer composed of a rubber composition comprising 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component with respect to 100 parts by weight of rubber containing 80 parts by weight or more of natural rubber or isoprene rubber. It is characterized in that it is installed on the inner surface of the tire.

한편, 상기 목적을 달성하기 위한 본 발명의 공기 타이어의 제조방법은 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 배합한 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 미가황 타이어를 성형한 다음, 당해 미가황 타이어를 가황하는 동시에 실란트층의 고무 조성물을 분해하도록 하는 것을 특징으로 한다.On the other hand, the method for producing a pneumatic tire of the present invention for achieving the above object is a rubber composition containing 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component relative to 100 parts by weight of rubber containing 80 parts by weight or more of natural rubber or isoprene rubber After molding the unvulcanized tire having the sealant layer formed on the inner surface of the tire, the unvulcanized tire is vulcanized and the rubber composition of the sealant layer is decomposed.

본원의 발명자 등이 타이어 가황 시 열에 의한 분해반응을 발생시키고 가스의 발생이 적은 분해반응에 관해 탐색한 결과, 천연 고무 또는 이소프렌 고무에 대해 소정의 코발트염을 첨가하는 경우 적합한 분해반응이 발생함을 발견하여 본 발명에 도달하였다. 이러한 분해반응에 의해 수득된 실란트층은 높은 점도를 나타내기 때문에 우수한 펑크 방지 기능을 발휘할 수 있다.When the inventors of the present application, etc., developed a decomposition reaction by heat during tire vulcanization and a decomposition reaction with less gas generation, a suitable decomposition reaction occurs when a predetermined cobalt salt is added to natural rubber or isoprene rubber. Discovery and reached the present invention. The sealant layer obtained by this decomposition reaction exhibits a high viscosity and can exert an excellent puncture preventing function.

본 발명에서는, 실란트층의 고무 조성물은 고무 100중량부에 대해 추가로 트리메틸 디하이드로퀴놀린 중합체 1 내지 10중량부를 배합하는 것이 바람직하다. 이와 같이 천연 고무 또는 이소프렌 고무에 대해 소정의 코발트염 및 동시에 소정의 트리메틸 디하이드로퀴놀린 중합체를 첨가함으로써 실란트층을 구성하는 고무 조성물의 분자량이 현저하게 저하되고 점도가 더욱 증가됨이 밝혀졌다.In this invention, it is preferable that the rubber composition of a sealant layer mix | blends 1-10 weight part of trimethyl dihydroquinoline polymers further with respect to 100 weight part of rubber | gum. Thus, it has been found that the addition of a predetermined cobalt salt and simultaneously a predetermined trimethyl dihydroquinoline polymer to natural rubber or isoprene rubber significantly lowers the molecular weight of the rubber composition constituting the sealant layer and further increases the viscosity.

또한 실란트층을 타이어의 내부 표면에 설치하는 경우, 실란트층을 인너 라이너층의 내측에 적층하고 당해 실란트층의 내측에 커버 시트층을 적층하는 것이 바람직하다. 이러한 적층 구조에 의해, 가황 시 실란트층이 가황기의 배합기에 점착되는 것이 현저하게 방지될 수 있다.In the case where the sealant layer is provided on the inner surface of the tire, it is preferable to laminate the sealant layer inside the inner liner layer and to stack the cover sheet layer inside the sealant layer. By this laminated structure, the sealant layer can be significantly prevented from adhering to the compounding machine of the vulcanizer during vulcanization.

실란트층에 관한 기초실험을 실시한다.Basic experiment on sealant layer is carried out.

종래예:Conventional example:

폴리이소부틸렌(PIB) 100중량부에 대해 퍼옥사이드를 15중량부 배합한 고무 조성물을 제조한다.The rubber composition which mix | blended 15 weight part of peroxides with respect to 100 weight part of polyisobutylene (PIB) is manufactured.

실시예 1:Example 1:

천연 고무(NR) 100중량부에 대해 코발트 성분으로서 나프텐산 코발트를 0.4중량부 배합한 고무 조성물을 제조한다.A rubber composition is prepared in which 0.4 part by weight of naphthenic acid cobalt is blended as 100 parts by weight of natural rubber (NR).

실시예 2:Example 2:

천연 고무(NR) 100중량부에 대해 코발트 성분으로서 네오데칸산-오르토-붕산 코발트(마노본드)를 0.4중량부 배합한 고무 조성물을 제조한다.A rubber composition comprising 0.4 parts by weight of neodecanoic acid-ortho-boric acid cobalt (manobond) as a cobalt component with respect to 100 parts by weight of natural rubber (NR) is prepared.

실시예 3:Example 3:

천연 고무(NR) 100중량부에 대해 코발트 성분으로서 네오데칸산-오르토-붕산 코발트(마노본드)를 0.4중량부, 트리메틸 디하이드로퀴놀린 중합체(노화방지제 RD)를 5중량부 배합한 고무 조성물을 제조한다.A rubber composition comprising 0.4 parts by weight of neodecanoic acid-ortho-boric acid cobalt (manobond) and 5 parts by weight of trimethyl dihydroquinoline polymer (anti-aging agent RD) as a cobalt component based on 100 parts by weight of natural rubber (NR). do.

이들 종래예 및 실시예 1 내지 3의 고무 조성물을 시트 형태로 가공하고, 이를 금형에 투입하여 160℃에서 15분 동안 가열한다. 이때 분해반응에 의한 가스 발생량을 상대적으로 평가한다. 또한 수득된 실란트층의 점도를 상대적으로 평가한다. 또한 실시예 2 및 3에 대해서는, 실란트층을 구성하는 고무 조성물의 분자량을 측정한다. 그 결과를 표 1에 재시한다.The rubber compositions of these conventional examples and Examples 1 to 3 are processed into a sheet form, which is put into a mold and heated at 160 ° C. for 15 minutes. At this time, the amount of gas generated by the decomposition reaction is relatively evaluated. In addition, the viscosity of the obtained sealant layer is relatively evaluated. In addition, about Examples 2 and 3, the molecular weight of the rubber composition which comprises a sealant layer is measured. The results are shown in Table 1 again.

종래예Conventional example 실시예1Example 1 실시예2Example 2 실시예3Example 3 실란트층의고무 조성물의배합물Blend of rubber composition of sealant layer 폴리이소부틸렌퍼옥사이드Polyisobutylene peroxide 고무나프텐산코발트Rubber naphthenate cobalt 고무마노본드Rubber Agate Bond 고무마노본드노화방지제 RDRubber Anode Bond Anti Aging Agent RD 가스 발생량Gas generation amount 많음plenty 적음Less 적음Less 적음Less 점도Viscosity 중medium 중medium 대versus 대versus 분자량Molecular Weight 측정하지 않음Do not measure 측정하지 않음Do not measure 7.67.6 2.82.8

표 1로부터 알 수 있는 바와 같이 실시예1 내지 3의 실란트층은 모두 종래예에 비해 분해반응에 의한 가스 발생량이 적고 점도가 높다. 또한 코발트염 및 트리메틸 디하이드로퀴놀린 중합체를 병용하는 경우에는 실란트층을 구성하는 고무 조성물의 분자량이 더 적음이 밝혀졌다.As can be seen from Table 1, all of the sealant layers of Examples 1 to 3 had a lower amount of gas generated by decomposition reaction and a higher viscosity than the conventional example. Moreover, when cobalt salt and trimethyl dihydroquinoline polymer are used together, it was found that the molecular weight of the rubber composition which comprises a sealant layer is smaller.

본 발명의 바람직한 실시 형태에 관해서 상세하게 기술했지만, 첨부된 청구항 의해 규정되는 본 발명의 요지 및 범위를 벗어나지 않으면서 본원에 대한 각종 변경, 대용 및 치환이 가능함을 이해해야 할 것이다.While the preferred embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions and substitutions can be made thereto without departing from the spirit and scope of the invention as defined by the appended claims.

본 발명에 따르면, 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 배합한 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 결과, 분해가스의 발생을 억제하면서 점도가 높은 펑크 방지용 실란트층을 갖는 공기 타이어를 수득할 수 있다.According to the present invention, a sealant layer composed of a rubber composition containing 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component with respect to 100 parts by weight of rubber containing 80 parts by weight or more of natural rubber or isoprene rubber is provided on the inner surface of the tire. As a result, a pneumatic tire having a puncture-resistant sealant layer with high viscosity can be obtained while suppressing generation of cracked gas.

Claims (6)

천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 함유하는 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 공기 타이어.A pneumatic tire provided with a sealant layer composed of a rubber composition containing 0.07 to 0.5 parts by weight of a cobalt salt as a cobalt component with respect to 100 parts by weight of a rubber containing 80 parts by weight or more of natural rubber or isoprene rubber. 제1항에 있어서, 실란트층의 고무 조성물이 고무 100중량부에 대해 트리메틸 디하이드로퀴놀린 중합체를 1 내지 10중량부 함유하는 공기 타이어.The pneumatic tire according to claim 1, wherein the rubber composition of the sealant layer contains 1 to 10 parts by weight of trimethyl dihydroquinoline polymer with respect to 100 parts by weight of rubber. 제1항 또는 제2항에 있어서, 실란트층을 인너 라이너층의 내측에 적층하고, 커버 시트층을 당해 실란트층의 내측에 적층한 공기 타이어.The pneumatic tire according to claim 1 or 2, wherein the sealant layer is laminated inside the inner liner layer, and the cover sheet layer is laminated inside the sealant layer. 천연 고무 또는 이소프렌 고무를 80중량부 이상 함유하는 고무 100중량부에 대해 코발트 성분으로서 코발트염을 0.07 내지 0.5중량부 함유하는 고무 조성물로 구성된 실란트층을 타이어의 내부 표면에 설치한 미가황 타이어를 성형한 다음, 당해 미가황 타이어를 가황하는 동시에 실란트층의 고무 조성물이 분해되도록 한, 공기 타이어의 제조방법.Molded unvulcanized tire having a sealant layer composed of a rubber composition containing 0.07 to 0.5 parts by weight of cobalt salt as a cobalt component with respect to 100 parts by weight of rubber containing 80 parts by weight or more of natural rubber or isoprene rubber. And then vulcanizing the unvulcanized tire and causing the rubber composition of the sealant layer to decompose. 제4항에 있어서, 실란트층의 고무 조성물이 고무 100중량부에 대해 트리메틸 디하이드로퀴놀린 중합체를 1 내지 10중량부 함유하는, 공기 타이어의 제조방법.The manufacturing method of the pneumatic tire of Claim 4 in which the rubber composition of a sealant layer contains 1-10 weight part of trimethyl dihydroquinoline polymers with respect to 100 weight part of rubber. 제4항 또는 제5항에 있어서, 실란트층을 인너 라이너층의 내측에 적층하고, 커버 시트층을 당해 실란트층의 내측에 적층한 미가황 타이어를 성형하는, 공기 타이어의 제조방법.The manufacturing method of the pneumatic tire of Claim 4 or 5 which forms the unvulcanized tire which laminated | stacked the sealant layer inside the inner liner layer, and laminated | stacked the cover sheet layer inside the said sealant layer.
KR10-2003-7016887A 2001-09-04 2002-09-03 Pneumatic tire and method of producing the same KR20040048879A (en)

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